Crushing-mill



(No Model.) 2 sheets-sheet 1. C. M. CARHART.

CRUSHING MILL.

Patented June 2, 1896 W/ TNE SSE S /MM ATTORNEYS.

(No Model.) 2 Sheets-Sheet 2 `C. M. GARHART.

GRUSHING MILL. No. 561,538. Patented June 2, 1896.

INVENTO? Bijl/mbv@ 'Nirnn STATES *ATENT muon,

CLARENCE M. CARHART, OF PLAINFIELD, NEV JERSEY, ASSIGNOR TO HIM- SELF,AND ABRAM AMERMAN, OF RARITAN, NEV JERSEY.

CRUSHlNG-MILL.

SPECIFICATION forming part of Letters PatentNo. 561,538, dated .T une 2,1896.

Application filed August 2l, 1895. Serial No. 560,023. (No model.)

To all whom it may concern:

Be it known that I, CLARENCE M. CARHART, of Plainfield, in the county ofUnion and State of New Jersey, have invented a new and usefulImprovement in Crushing-Mills, of which the following is a full, clear,and exact description.

My invention relates to an improvement in crushing-mills; and the objectof the invention is to provide a mill simple, durable, and economic inits construction, and one in which the crushed or pulverized materialwill be conveyed in substantiallya direct manner to an amalgamating panor trough, and whereby, further, 4the pulverized material will beretarded in its action when passing over the aforesaid pan or trough toinsure a maximum quantity of metal being taken up by the quicksilver.

Another object of the invention is to provide for a quick and thoroughdelivery of the waste products from the mill, and to furthermore providefor retarding the material while acted upon between the rollers and thedie, so as to insure a complete pulverization of the said material, and,furthermore, to provide a cushion between the dieand its support whichwill prevent undue jarring of the machine and undue noise, and,furthermore,` to provide a means whereby the rollers may be connectedwith their actuating mechanism in a convenient and expeditious manner,and likewise to provide for a convenient and expeditious dismantling ofthe machine.

The invention consists in the novel construction and combination of theseveral parts, as will be hereinafter fully set forth,

and pointed out in the claims.

Reference is to be had to the accompanying 4o drawings, forming a partof this specification,

in which similar characters of reference indicate corresponding parts inall the figures.

Figure 1 is a central vertical section through the mill, takensubstantially on the line 1 l of Fig; 8. Fig. 2 is a side elevation ofthe carrier for the stem of one of the rollers, and

Fig. 3 is a View in Awhich the hopper is removed and a portion of thecap or covering broken away to disclose a roller and the cushion betweenthe die and its support.

In carrying out the invention a base A is promore provided with amarginal flange 13 upon its upper face and a second flange 13b betweenthe center and the outer flange, and within the inner flange 13b acavity or hori- -Zontal chamber 13 is formed upon the upper face of theaforesaid ring 10. A sleeve 14. is adapted for attachment to thebase-ring 10, being provided with a flaring base 15, entering andfitting the countersink 12 of the said ring-base and being removablysecured therein by bolts 16.

Bushings 17 are preferably placed within the said sleeve 14, and a shaft18 is passed through the said bushings, as is -best shown in Fig. 1. Thelower end of the shaft is preferably attached to or is in frictionalcontact with a plate 19, held to revolve on ball-hear-v ings 20,placed'in a socket 2l, formed in the central portion of the aforesaidbase, and a collar 22 is placed at the foot of the shaft 18, holding ita predetermined distance from the bottom of the socket 21, while withinthe base a gear 23, having, preferably, beveled teeth, is secured on theaforesaid shaft 18, being made to mesh with a pinion 24, secured to adriveshaft 25, carrying a driving-pulley 26 and clutch 27 in engagementwith the said pulley, or the equivalent of the clutch.

A body-ring 28 is fitted upon the iiange 13 of the base-ring and theadjacent surface, the rib preventing the base-rin g from having lateralmovement, and a ring-die 29 is supported, preferably, upon the innerflange or rib 13b of the base-ring, being separated from the bodyring 28by a cushion 30 of wood oralike ma. terial, and in order that the die 29shall not slip or have movement of any description the cushion 8O ismade up of a series of slabs, as shown in Fig. 3, comprising slabs a,fitted to the space between the die and the body-ring, and wider slabsa, which enter recesses in the opposing faces of the two parts, servingto anchor the die where it is placed.

The space between the die and the body-ring is preferably tapering, andconsequently the cushioning-blocks are of a wedge pattern, and

IOO

the inner face of the annular die 29 is likewise tapering, beinginclined from the top downwardly and outwardly, so that its uppersurface is wider than its lower surface, as is clearly shown in Fig. 1.

An amalgamating-pan 32 in the form of a trough is located over the die29, the said pan or trough being of annular construction and providedwith a downwardly and outwardly extending flange 33, thereby forming asupport for the trough 32,whereby the same is held above the body-ring28, said fiange being secured, by means of bolts 31, to the body-ring28; but the said fiange is cut away at one side of the machine and inits stead a trough 34 is formed to conduct the surplus material from themachine. The inner part of the -flange 33 overhangs the inner edge ofthe annular bodyring, so as to prevent the wedge-shaped cushion-sections30 from being forced from between the body-ring and the die in theoperation of the machine.

A gutter 36 is made to surround the amalgamating-pan, and this gutter isgiven an inclination in direction of the aforesaid trough 34, as shownin dotted lines in Fig. 1, and the said gutter is covered by a cap-plateB, supported on brackets 35, secured to the flange 33, which plateconsequently extends over the amalgamating trough or pan 32, and isprovided with an annular partition 37, which extends downward within theamalgamating trough or pan a predetermined distance, the said gutterbeing provided with an opening 38 over the trough 34, through which thematerial supplied to the gutter finds an exit.

The cap-plate B is made, preferably, in two sections, and the sectionsare connected by passing bolts through flanges 39, made at the terminalsof the sections. The cap-plate is annular, being provided with a centralopening 40, the opening being of slightly less diameter than theinterior diameterof the ringdie over which it is located, and the saidopening in the cap-plate is surrounded by a flange 41, which extendsdownward below the amalgamating pan or trough 32.

A driving-head 42, provided with a dust- 'flange 43 and a horizontalflange 44, is secured upon the upper end of the shaft 18, the dust-[iange extending downward over the upper portion of the aforesaid sleeve 14,secured to the base-ring 10, and on the said horizontal flange 44 of thedriving-head a plate 45 is secured by means of bolts 46 or theirequivalents, the said bolts being likewise made to secure on the plate45 a substantially conical casing 47, extending above the driving headand shaft 18.

The plate 45, which is attached to the driving-head, is polygonal inshape, and in each of its sides a recess 47 is produced, as shown inFig. 3. 48 is jeurnaled, and each sleeve is provided with side arms 49,as shown in Fig. 2, the arms carrying bolt-trunnions 50, which are Ineach of the recesses 47 a sleeve` journaled in perforated lugs formed atthe ends of the recesses 47 E The sleeves 48 extend above and belowtheir trunnions, and each sleeve contains, preferably, an upper and alower bushing 51, as shown in Fig. 1, and in each sleeve 48 a stem orspindle 52 is entered, fitted to the bushings 51, and a flangedthrust-collar or'equivalent enlargement 53 is secured upon the upper endof each of the stems, which are threaded, being fitted over the tops ofthe sleeves, and these thrust-collars are split, being connected bybinding-screws 54, in order that these collars may be readily removedwhen occasion may demand.

The lower end of each stem 52 is enlarged and made tapering, as shown at55 in Fig. 1, and the said tapering enlarged end of each stem is fittedin wedge fashion in the central portion of the roller 56. The rollersare provided with peripheral teeth 57, fiat upon their outer orperipheral surfaces, and the peripheries of the rollers are upwardlyinclined or are rendered tapering, whereby their upper ends are narrowerthan their bottom portions, and the tapering of the teeth corresponds tothe inclination or taper of the inner wall of the ring-die 29, withwhich wall the rollers are adapted for contact. A hopper 57 f issupported above the conical case 47 and is placed in loose communicationtherewith, being held by suitable uprights 58, which are supported,preferably, on the cap B.

A bracket 58 is projected upwardly from a wall of the hopper over thecenter thereof, and a stem 59 has a universal or ball-andsocketconnection with the said bracket. At

the lower end of the stem 59 a disk-shaped agitator 60 is secured in anysuitable or approved manner, and this disk receives a wristpin 61,eccentrically placed in the top of the shaft 18, so that when this shaftis revolved the agitator is given an eccentric .motion at the bottom ofthe hopper and consequently keeps the material feeding from the hopperin constant agitation.

The material from the hopperis fed into the conical casing 47 and findsan exit through openings 62 (see Fig. 3) in the horizontal flange of thedriving-head 42 at the top of the shaft 18, and passes through theseopenings into chutes 63, which conduct the material close to if notpractically in contact with the inner face of the annular die 29.

In the operation of the machine as the shaft 18 revolves the rollers aregiven a rotary mo tion by reason of the sleeve in which their stems arejournaled being revolved, and the rollers likewise have independentrotary motion around their stems. The rollers impact on the inner faceof the die 29 and thoroughly crush or pulverize the material supplied tothem, the inclined faces of the rollers and dies serving to retard thematerial and prevent it from leaving these parts too soon, it beingunderstood, however, that this retarding action IOO IIO

may be obtained by curving instead of inclining the contacting faces ofthe rollers and the die.

By reason of the rollers and die being toothed and having their teethintermeshed it is evident that as the rollers turn the particles of orewill pass into the recesses in the die and will be held against movementand crushed by the action of the teeth on the rollers. Moreover, therollers being mounted pivotally in such a way thatv they are adapted toswing, it is evident that as the rollers turn, their teeth on enteringbetween the teeth of the die will strike the ore held between the teethof the die and will have a stamping action, serving to pulverize the oreheld between the said teeth. p

The cushion 30, intervening the body-ring 28 and the die 29, serves toprevent the impact of the rollers on the die from unnecessarily jarringthe machine, thus materially adding to the life of the latter, and italso serves to deaden the sounds which in machines of this character arevery pronounced.

The material, after it has been pulverized between the rollers and thedie, will by centrifugal action be thrown upward and over theamalgamating-pan 32, where the quicksilver will amalgamate the particlesof metal, the refuse flowing over from thepan into the gutter 3G andfinding an exit from the gutter into the trough 34, and it is obviousthat the iiange 37, extending down into the amalga mating-pan, willforce all of the material sent upward by centrifugal force to passslowly over the amalgam-bath, thereby insuring a maximum of metal beingdeposited therein.

Owing to the peculiar construction of this machine-that is, the mannerin which the several parts are bolted-by removing the hopper, the casing47, and the sleeves 48 the rollers may be readily removed from themachine and any metal that may have settled in the base-cha1nber 13cwill be rendered accessible and may bc readily removed. Ordinarily inthis class of machines much time is consumed and much trouble isexperienced in dismantling the machine and replacing and securing itsparts for action.

IIaving thus described my invention, I claim as new and desire to secureby Letters Patent- 1. The combination of a driving-shaft, a hopper, andan agitator located at the outlet of the hopper, said agitator beingheld loosely at its upper part and having its lower part eccentricallyconnected with the said drivingshaft, as and for the purpose specified.

2. In a crushing-mi1l, the combination of a base, a body-ring arrangedthereon, a die of circular form inside the body-ring, a cushion ofWedgeshaped cross-section held between the body-ring and die, and aiiange secured to the body-ring and overhanging the inner edge of thesame, said overhanging port-ion of the flange being arranged to engagesaid cushion and die to prevent the same from be ing forced out ofposition, substantially as set forth.

3. The combination of a hopper, a stem, an arm supporting said stem andcoupled to the upper end thereof by a universal joint, an agitatorcarried on said stem at the outlet of the hopper and of' less dimensionsthan said outlet, a drivingshaft, and a wrist-pin on said shaft formoving said agitator, substantially as set forth.

4. In a crushing-mill, the combination of a base having a body-ring, acircular die inside the body-ring, a series of rollers carried on shaftspivotally mounted at their upper ends, said rollers being arranged toengage the die, a circular flange secured to the body-ring and extendingover the upper edge of the die, and a circular mercury-chamber supportedon said flange and surrounding said die, substantially as set forth.4

VCLr-iRl}l\lCE M. CARHART.

fitness es WILLIAM R. CoDINeToN, JOHN KIRoH.

